DSA in Python – Top View of Binary Tree | Vertical Line BFS + Hashmap | GFG – Part 114 [Hindi]

🚀 Welcome to Part 114 of Code & Debug’s DSA in Python Course!

In this lecture, we solve the Top View of Binary Tree problem from GeeksforGeeks. We use a BFS traversal + hashmap approach to capture the first visible node at every vertical level from the top view.

📚 What you’ll learn in this video:
✅ What is the top view of a binary tree
✅ How to track horizontal distance (line number)
✅ BFS traversal using queue + dictionary
✅ Sorting by keys to produce left-to-right view
✅ Time and space complexity analysis

👉 Practice the problem on GeeksforGeeks:
🔗 https://geeksforgeeks.org/problems/top-view-of-binary-tree/1

👉 Refer to the article for better understanding:
🔗 https://codeanddebug.in/blog/top-view-of-binary-tree/

👉 📄 Access the full YouTube DSA Playlist Sheet (All Questions in Order):
🔗 https://docs.google.com/spreadsheets/d/1AWE15Fy3wD2iqu2vjK_R7cCiuvSsjYQclcdZmHpF66o/edit?usp=sharing

👉 Enroll in this FREE DSA Python course here:
🔗 https://codeanddebug.in/course/master-dsa-with-leetcode

👉 Enroll for Self-Paced Advanced DSA course here:
🔗 https://codeanddebug.in/course/zero-to-hero-python-dsa

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